small query- gray questions in window of qbank

2/2/2015 11:53:44 AM
During the review mode for a block, some of the questions in the question number window appear shaded in gray, while others are white.
say 3 or 4 out of 20
What is the significance of this highlight on these questions?

Anyone knows? please let me know


2/4/2015 9:58:03 AM
please! someone must know...


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